package com.hanqi.test;

import android.app.Activity;

import android.os.Bundle;

import android.util.Log;

/**

 * Created by Administrator on 2016/3/16.

 */

public class Activity2 extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState){

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity2);

         System.out.println("这是我运行的第一个activity");

        Log.d("text", "log输出的信息");

        Log.e("text","log输出的信息");

        Log.w("text","log输出的信息");

        Log.i("text","log输出的信息");

        Log.v("text","log输出的信息");

    }

}

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="大家好"

        />

</LinearLayout>